<template>
  <div v-if="modelValue && preview">
    <el-image v-if="typeof modelValue == 'string'" :src="modelValue" fit="cover"
      class="w-[100px] h-[100px] rounded border mr-2"></el-image>
    <div v-else class="flex flex-wrap">
      <div class="relative mx-1 mb-2 w-[100px] h-[100px]" v-for="(url, index) in modelValue" :key="index">
        <el-icon class="absolute right-[5px] top-[5px] cursor-pointer bg-white rounded-full" style="z-index: 10;"
          @click="removeImage(url)">
          <CircleClose />
        </el-icon>
        <el-image :src="url" fit="cover" class="w-[100px] h-[100px] rounded border mr-2"></el-image>
      </div>
    </div>
  </div>

  <div v-if="preview" class="choose-image-btn" @click="open">
    <el-icon :size="25" class="text-gray-500">
      <Plus />
    </el-icon>
  </div>
  <el-dialog title="选择图片" v-model="dialogVisible" width="80%" top="5vh">

    <el-container class="bg-white rounded" style="height:70vh;">
      <el-header class="image-header">
        <el-button type="primary" size="small" @click="handleOpenCreate">新增图片分类</el-button>
        <el-button type="warning" size="small" @click="handleOpenUpload">上传图片</el-button>
      </el-header>
      <el-container>
        <ImageAside ref="ImageAsideRef" @change="handleAsideChange" />
        <ImageMain :limit="limit" openChoose ref="ImageMainRef" @choose="handleChoose" />
      </el-container>
    </el-container>

    <template #footer>
      <span>
        <el-button @click="close">取消</el-button>
        <el-button type="primary" @click="submit">确定</el-button>
      </span>
    </template>
  </el-dialog>

</template>

<script setup>

import { ref } from "vue"
import ImageAside from '~/components/ImageAside.vue'
import ImageMain from '~/components/ImageMain.vue'
import { toast } from "~/composables/util";
// 默认隐藏dialog
const dialogVisible = ref(false)
// 存回调
const callbackFunction = ref(null)
// 打开dialog
const open = (callback = null) => {
  callbackFunction.value = callback
  dialogVisible.value = true
}
// 关闭dialog
const close = () => dialogVisible.value = false

const ImageAsideRef = ref(null)
const handleOpenCreate = () => ImageAsideRef.value.handleCreate()

const imageMainRef = ref(null)
// 拿到当前点击时的分类id
const handleAsideChange = (image_class_id) => {
  imageMainRef.value.loadData(image_class_id)
}

// 通过组件实例,拿到子组件暴露出来的方法
const handleOpenUpload = () => imageMainRef.value.openUploadFile()

const props = defineProps({
  modelValue: [String, Array],
  limit: {
    type: Number,
    default: 1
  },
  preview: {
    type: Boolean,
    default: true
  }
})
const emit = defineEmits(["update:modelValue"])

let urls = []
// 拿到选中的图片
const handleChoose = (e) => {
  urls = e.map(o => o.url)
}

// 点击确定
const submit = () => {
  let value = [] // 选中的值
  // 判断limit拿到的值是不是等于一
  if (props.limit === 1) {
    limit = urls[0]
  } else {
    value = props.preview ? [...props.modelValue, ...urls] : [...urls]
    // 判断value的长度
    if (value.length > props.limit) {
      const limit = props.preview ? (props.limit - props.modelValue.length) : props.limit
      return toast(`最多还能选择${limit}张`)
    }
  }
  if (value && props.preview) {
    emit('update:modelValue', value)
  }
  if (!props.preview && typeof callbackFunction.value === 'function') {
    callbackFunction.value(value)
  }
  close()
}

// 移出图片
const removeImage = (url) => {
  emit('update:modelValue', props.modelValue.filter(u => u != url))
}

</script>

<style scoped>
.choose-image-btn {
  @apply w-[100px] h-[100px] rounded border flex items-center justify-center cursor-pointer hover: (bg-gray-100);
}

.image-header {
  border-bottom: 2px solid #eee;
  @apply flex items-center;
}
</style>